Which among the following statements are true for unisexual flowers?
(i) they possess both stamen and pistil
(ii) they possess either stamen or pistil
(iii) they exhibit cross-pollination
(iv) unisexual flowers possessing only stamens cannot produce fruits
unisexual flowers
(i) Possess either stamen or pistil
(ii) Exhibit cross-pollination
(iii) Possessing only stamens cannot produce fruits